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Detcon Model 410A RACK
Panel Mount Control Enclosure
Operator's Instruction Manual
November 4, 1994 • Document #2469 • Version 1.0
1.0 INTRODUCTION
Detcon Model 410A Rack consists of 3 major assemblies:
1. The NEMA 1 rack mount control enclosure.
2. The single channel digital control modules.
3. The remote mount gas sensor assemblies.
The NEMA 1 control enclosure is detailed in section 1.0 of the manual, the control modules in
section, 2.0 and applicable sensor assemblies in section 3.0.
1.1 DESCRIPTION
Detcon Model 410A along with Model 10A digital control modules is designed to serve as a
host assembly for up to four remote mount gas detection sensor assemblies. The control enclosure is rated NEMA 1 suitable for installation in non-hazardous locations. The single channel
modular design supports application flexibility wherein multiple function gas detection systems
can be configured in any combination up to four channels. All control modules are plug-in front
panel accessible for easy maintenance and repair.
The system is powered by a removable power supply assembly mounted inside the host
assembly. A power switch and 3 amp fuse are mounted on the front of the power supply assembly. The back of the assembly provides for 117 VAC input, 24 VDC output (to controller motherboard) and an auxiliary 24 VDC input (for battery backup) via lug-type terminals.
Discreet output terminal strips located on the controller motherboard are provided for sensor
detcon inc.
C
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K
L
MODEL 10A
H2S MONITOR
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HIGH
LOW
FAULT
ALARM
RESET
detcon inc.
HOUSTON, TEXAS
C
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MODEL 10A
H2S MONITOR
ppm
HIGH
LOW
FAULT
ALARM
RESET
detcon inc.
HOUSTON, TEXAS
C
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L
MODEL 10A
H2S MONITOR
ppm
HIGH
LOW
FAULT
ALARM
RESET
detcon inc.
HOUSTON, TEXAS
C
O
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MODEL 10A
H2S MONITOR
ppm
HIGH
LOW
FAULT
ALARM
RESET
detcon inc.
HOUSTON, TEXAS
MODEL 410A RACK
detcon inc.
HOUSTON, TEXAS
POWER FUSE
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terminations, Form C dry contact alarm outputs (normally open, normally closed and common),
4-20 ma outputs for remote recording devices, alarm reset, and 24 VDC input.
Form C relay outputs may be discreet, zoned or common by gold plated jumper tabs located
on the controller mother board.
1.2 SPECIFICATIONS
ELECTRICAL CLASSIFICATION: NEMA 1
DIMENSIONS: 13"W, 5"H, 8.25"D
CAPACITY: 4 Single Channels
POWER: 117 VAC to Power Supply Assembly; 24 VDC Input to Controller Motherboard
ALARM CONTACTS: Discreet Fault, Low, High, per Channel 2 Amp @ 30VDC/.6 Amp @ 125VAC
Common, Normally Open and Normally Closed
OUTPUTS: Discreet 4-20 MADC
OPERATING TEMPERATURE RANGE: -40°F to +175°F
POWER CONSUMPTION: <5 Watts per Channel (Power Supply Rated 57 Watts)
1.3 REMOTE RESET
The reset function is effective when the Model 10A's respective alarms have been programmed in the latching position and alarm conditions have passed. The alarm reset function is
common to all controllers and is activated by closing the circuit between the two reset contacts.
A normally open momentary switch is suitable.
1.4 INSTALLATION
01. Securely mount the 410A rack enclosure in accordance with the drawing in figure 1.
02. Connect 117 VAC input wiring to the lug-type terminal strip (labeled 120 VAC IN) on the
back of the power supply assembly (see fig 2). Line power current load is maximum 3 amps.
03. Connect the (optional) 24 VDC standby battery to the lug-type terminal strip (labeled AUX
DC IN) on the back of the power supply assembly (see fig 2).
Caution: Observe correct polarity when terminating all input / output field wiring. Failure
to do so may result in circuit damage on power up.
04. If applicable, connect a normally open momentary remote mounted switch to the lugless
terminal strip (labeled RESET) located on the controller mother board (see fig 2).
05. Refer to installation and wiring detail of remote mount sensor assemblies as detailed in
section 3.0. Terminate field wiring from sensors to Model 410A rack lugless terminal strips
located on the controller mother board (see fig 2).
Note: Based on the application and use of relay contact outputs, complete all wiring
terminations prior to application of power. Shut-in controls may be omitted until system
test is complete.
1.5 START-UP
Upon completion of all field wiring: Depress the power switch on the power supply assembly
front panel. Note that each Model 10A controller digital display illuminates. Varying readings
may occur during sensor warm-up. A 10 second alarm delay will occur on power up. Refer to
sections 2.0 and 3.0 for additional start-up detail.
Detcon Model 410A Rack Gas Detection System PG.2
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1.6 SPARE PARTS
0224 Gold plated jumper tab
3209 Power switch
2800 28 VDC lamp for power switch
0269 Green switch cap
3280 Black/Red cap fuse holder
0300 3 amp (3AG) slow blow fuse - box of 5
3606 Power supply assembly - 24VDC @ 2.4 amp
Detcon Model 410A Rack Gas Detection System PG.3
Fig. 1
PANEL CUT-OUT IS 11.5" x 4"
#10-32 x .75 SCREW, #10 STAR WASHER AND #10 NUT
11
MOUNTING HOLES - .25" DIA.
8.25
5
2.25
12.25
13
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3.18 WARRANTY
Detcon inc., as manufacturer, warrants under intended normal use each new Model 410A rack
control enclosure to be free from defects in material and workmanship for a period of one year.
The warranty period begins from the date of shipment to the original purchaser and ends one
year thereafter. All warranties and service policies are FOB the Detcon Inc. facility located in The
Woodlands, Texas.
Fig. 2
Detcon Model 410A Rack Gas Detection System PG.4
Shipping Address: 3200 A-1 Research Forest Dr., The Woodlands, Texas 7381
Mailing Address: P.O. Box 8067, The Woodlands, Texas 77387-8067
phone 888-367-4286, 281-367-4100 • fax 281-292-2860 • www.detcon.com • sales@detcon.com
TYPICAL
EACH
CHANNEL
120 VAC IN
L1 L2 GND
AUX DC IN
DC OUT
LOW NORMALLY CLOSED
LOW COMMON
LOW NORMALLY OPEN
HIGH NORMALLY CLOSED
HIGH COMMON
HIGH NORMALLY OPEN
FAULT NORMALLY OPEN
FAULT COMMON
FAULT NORMALLY CLOSED
+ 4-20 MA OUTPUT
COMMON 4-20 MA OUTPUT
+ SIGNAL (MA)
SENSOR
+ TRANSMITTER
– TRANSMITTER
10
11
12
13
14
1
2
3
4
5
6
7
8
9
EXTERNAL RESET
CLOSE TO RESET
DC IN COMMON
DC IN POSITIVE
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